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org.activemq.filter
Class ComparisonExpression  

java.lang.Object
  org.activemq.filter.BinaryExpression
      org.activemq.filter.ComparisonExpression

All Implemented Interfaces:

BooleanExpression, Expression

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public abstract class ComparisonExpression

extends BinaryExpression

implements BooleanExpression

A filter performing a comparison of two objects

Version:

$Revision: 1.1.1.1 $

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Nested Class Summary
(package private) static class	ComparisonExpression.LikeExpression

 

Field Summary
private static java.util.HashSet	REGEXP_CONTROL_CHARS

 

Fields inherited from class org.activemq.filter.BinaryExpression

left, right

 

Constructor Summary

ComparisonExpression(Expression left, Expression right)

 

Method Summary
protected abstract  boolean	asBoolean(int answer)
static void	checkEqualOperand(Expression expr)           Validates that the expression can be used in == or <> expression.
private static void	checkEqualOperandCompatability(Expression left, Expression right)
static void	checkLessThanOperand(Expression expr)           Only Numeric expressions can be used in >, >=, < or <= expressions.s
protected  java.lang.Boolean	compare(java.lang.Comparable lv, java.lang.Comparable rv)
static BooleanExpression	createBetween(Expression value, Expression left, Expression right)
static BooleanExpression	createEqual(Expression left, Expression right)
static BooleanExpression	createGreaterThan(Expression left, Expression right)
static BooleanExpression	createGreaterThanEqual(Expression left, Expression right)
static BooleanExpression	createInFilter(Expression left, java.util.List elements)
static BooleanExpression	createIsNotNull(Expression left)
static BooleanExpression	createIsNull(Expression left)
static BooleanExpression	createLessThan(Expression left, Expression right)
static BooleanExpression	createLessThanEqual(Expression left, Expression right)
static BooleanExpression	createLike(Expression left, java.lang.String right, java.lang.String escape)
static BooleanExpression	createNotBetween(Expression value, Expression left, Expression right)
static BooleanExpression	createNotEqual(Expression left, Expression right)
static BooleanExpression	createNotInFilter(Expression left, java.util.List elements)
static BooleanExpression	createNotLike(Expression left, java.lang.String right, java.lang.String escape)
private static BooleanExpression	doCreateEqual(Expression left, Expression right)
java.lang.Object	evaluate(javax.jms.Message message)

 

Methods inherited from class org.activemq.filter.BinaryExpression

equals, getExpressionSymbol, getLeft, getRight, hashCode, setLeft, setRight, toString

 

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

 

Field Detail

REGEXP_CONTROL_CHARS

private static final java.util.HashSet REGEXP_CONTROL_CHARS

Constructor Detail

ComparisonExpression

public ComparisonExpression(Expression left,
                            Expression right)

Method Detail

createBetween

public static BooleanExpression createBetween(Expression value,
                                              Expression left,
                                              Expression right)

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createNotBetween

public static BooleanExpression createNotBetween(Expression value,
                                                 Expression left,
                                                 Expression right)

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createLike

public static BooleanExpression createLike(Expression left,
                                           java.lang.String right,
                                           java.lang.String escape)

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createNotLike

public static BooleanExpression createNotLike(Expression left,
                                              java.lang.String right,
                                              java.lang.String escape)

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createInFilter

public static BooleanExpression createInFilter(Expression left,
                                               java.util.List elements)

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createNotInFilter

public static BooleanExpression createNotInFilter(Expression left,
                                                  java.util.List elements)

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createIsNull

public static BooleanExpression createIsNull(Expression left)

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createIsNotNull

public static BooleanExpression createIsNotNull(Expression left)

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createNotEqual

public static BooleanExpression createNotEqual(Expression left,
                                               Expression right)

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createEqual

public static BooleanExpression createEqual(Expression left,
                                            Expression right)

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doCreateEqual

private static BooleanExpression doCreateEqual(Expression left,
                                               Expression right)

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createGreaterThan

public static BooleanExpression createGreaterThan(Expression left,
                                                  Expression right)

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createGreaterThanEqual

public static BooleanExpression createGreaterThanEqual(Expression left,
                                                       Expression right)

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createLessThan

public static BooleanExpression createLessThan(Expression left,
                                               Expression right)

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createLessThanEqual

public static BooleanExpression createLessThanEqual(Expression left,
                                                    Expression right)

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checkLessThanOperand

public static void checkLessThanOperand(Expression expr)

Only Numeric expressions can be used in >, >=, < or <= expressions.s

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checkEqualOperand

public static void checkEqualOperand(Expression expr)

Validates that the expression can be used in == or <> expression. Cannot not be NULL TRUE or FALSE litterals.

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checkEqualOperandCompatability

private static void checkEqualOperandCompatability(Expression left,
                                                   Expression right)

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evaluate

public java.lang.Object evaluate(javax.jms.Message message)
                          throws javax.jms.JMSException

Specified by:

evaluate in interface Expression

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compare

protected java.lang.Boolean compare(java.lang.Comparable lv,
                                    java.lang.Comparable rv)

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asBoolean

protected abstract boolean asBoolean(int answer)

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